I have a 1994 sentra. Maybe a bad ignition switch what do you nissan techs think?

Just replaced starter because it was rolling over slow. I have checked all electrical connections. When I turn the key some times it will do nothing, but when I turn the key back to the original start postion and try it again it will start just fine. I checked the electrical plug where it connects to the starter seems to be ok unless it needs cleaned. I think maybe it is the ignition switch starting to act up. What do you all think